An original stationary car with a mass of 1500 kg reaches a velocity of 15 m/s/s after starting. what is the car's acceleration?

Hmmm. THe velocity is 15m/s^2 ? that is the acceleration. Maybe you meant a velocity of 15m/s

Well, you cannot determine that, unless given a distance traveled or time traveled.

To find the acceleration of the car, we need to use the formula:

acceleration = (final velocity - initial velocity) / time

Here, the final velocity (v) is given as 15 m/s, and the initial velocity (u) of the stationary car is 0 m/s (since the car starts from rest). However, it's important to note that the given value of "15 m/s/s" seems to be incorrect or misunderstood, as it does not represent velocity.

If we assume that you meant the car reaches a velocity of 15 m/s after a certain time, we would need to know the time it took the car to reach this velocity. Without that information, it's not possible to calculate the exact acceleration in this particular problem.